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In 1920, Hirose demonstrated the luteinising effect of placental tissue and one year later, Evans and Long described luteinised ovaries in rats treated with hypophysial extracts. In 1926, Zondek and Aschheim as well as Smith, independently of each other, showed that a gonad-stimulating hormone was secreted by the adenohypophysis. In 1927, Aschheim and Zondek found their "Prolan" in human pregnancy urine and the first reliable pregnancy test was available. In the following years it could be demonstrated that the gonadotropic hormones from pituitary and from pregnancy urin were not of identical structure. During the years 1931 - 1933 Fevold and coworkers prepared follicle stimulating hormone from sheep pituitaries which were free of other hormone activities. Already in 1934, Collip found "antihormones" in animals treated with proteinhormones from animals of another species. It could be shown that they were antibodies against these hormones and this was the future basis for the immunological era starting in 1960. The quantitative determination of gonadotropins has been performed over several decades by difficult bioassays and since 1960 immunological and later radioimmunological assays became available. Since that time a new field was opened for the studies of gonadotropins. During this time, highly purified preparations of gonadotropins were available for research and clinical treatment. I recall the first successful attempt of inducing follicle growth and ovulation by Gemzell and coworkers 1958 as well as by Lunenfeld and Bettendorf at about the same time.

This book, published in two volumes, provides the most comprehensive review of lamprey biology since Hardisty and Potter’s “The Biology of Lampreys” published more than 30 years ago. This second volume offers a synthesis of topics related to the lamprey gonad  (e.g., lamprey sex ratios, sex determination and sex differentiation, sexual maturation, and sex steroids), the artifical propagation of lampreys, post-metamorphic feeding and the evolution of alternative feeding and migratory types, the history and status of sea lamprey control in the Laurentian Great Lakes and Lake Champlain, and an overview of contributions of lamprey developmental studies for understanding vertebrate evolution.

From the moment intersexuality-the condition of having physical gender markers (genitals, gonads, or chromosomes) that are neither clearly female nor male-is suspected and diagnosed, social institutions are mobilized in order to maintain the two seemingly objective sexual categories. Infants' bodies are altered, and what was "ambiguous" is made "normal." Kessler's interviews with pediatric surgeons and endocrinologists reveal how the intersex condition is normalized for parents and she argues that the way in which intersexuality is managed by the medical and psychological professions displays our culture's beliefs about gender and genitals.Parents of intersexed children are rarely heard from, but in this book they provide another perspective on reasons for genital surgeries and the quality of medical and psychological management. Although physicians educate parents about how to think about their children's condition, Kessler learned from parents of intersexed children that some parents are able to accept atypical genitals. Based on analysis of the medical literature and interview with adults who had received treatment as interesexed children, Kessler proposes new approaches for physicians to use in talking with parents and children. She also evaluates the appearance of a politicized vanguard, many of who are promoting an intersexual identity, who seek to alter the way physicians respond to intersexuality.Kessler explores the possibilities and implications of suspending a commitment to two "natural" genders and addresses gender destabilization issues arising from intersexuality. She thus compels readers to re-think the meaning of gender, genitals, and sexuality.

In 1920, Hirose demonstrated the luteinising effect of placental tissue and one year later, Evans and Long described luteinised ovaries in rats treated with hypophysial extracts. In 1926, Zondek and Aschheim as well as Smith, independently of each other, showed that a gonad-stimulating hormone was secreted by the adenohypophysis. In 1927, Aschheim and Zondek found their "Prolan" in human pregnancy urine and the first reliable pregnancy test was available. In the following years it could be demonstrated that the gonadotropic hormones from pituitary and from pregnancy urin were not of identical structure. During the years 1931 - 1933 Fevold and coworkers prepared follicle stimulating hormone from sheep pituitaries which were free of other hormone activities. Already in 1934, Collip found "antihormones" in animals treated with proteinhormones from animals of another species. It could be shown that they were antibodies against these hormones and this was the future basis for the immunological era starting in 1960. The quantitative determination of gonadotropins has been performed over several decades by difficult bioassays and since 1960 immunological and later radioimmunological assays became available. Since that time a new field was opened for the studies of gonadotropins. During this time, highly purified preparations of gonadotropins were available for research and clinical treatment. I recall the first successful attempt of inducing follicle growth and ovulation by Gemzell and coworkers 1958 as well as by Lunenfeld and Bettendorf at about the same time.

This book, published in two volumes, provides the most comprehensive review of lamprey biology since Hardisty and Potter’s “The Biology of Lampreys” published more than 30 years ago. This second volume offers a synthesis of topics related to the lamprey gonad  (e.g., lamprey sex ratios, sex determination and sex differentiation, sexual maturation, and sex steroids), the artifical propagation of lampreys, post-metamorphic feeding and the evolution of alternative feeding and migratory types, the history and status of sea lamprey control in the Laurentian Great Lakes and Lake Champlain, and an overview of contributions of lamprey developmental studies for understanding vertebrate evolution.

From the moment intersexuality-the condition of having physical gender markers (genitals, gonads, or chromosomes) that are neither clearly female nor male-is suspected and diagnosed, social institutions are mobilized in order to maintain the two seemingly objective sexual categories. Infants' bodies are altered, and what was "ambiguous" is made "normal." Kessler's interviews with pediatric surgeons and endocrinologists reveal how the intersex condition is normalized for parents and she argues that the way in which intersexuality is managed by the medical and psychological professions displays our culture's beliefs about gender and genitals.Parents of intersexed children are rarely heard from, but in this book they provide another perspective on reasons for genital surgeries and the quality of medical and psychological management. Although physicians educate parents about how to think about their children's condition, Kessler learned from parents of intersexed children that some parents are able to accept atypical genitals. Based on analysis of the medical literature and interview with adults who had received treatment as interesexed children, Kessler proposes new approaches for physicians to use in talking with parents and children. She also evaluates the appearance of a politicized vanguard, many of who are promoting an intersexual identity, who seek to alter the way physicians respond to intersexuality.Kessler explores the possibilities and implications of suspending a commitment to two "natural" genders and addresses gender destabilization issues arising from intersexuality. She thus compels readers to re-think the meaning of gender, genitals, and sexuality.